* Kim F. Storm (2005-06-27) writes:
> However, when I try it with the code above, it beeps in line-move-1
> when I move backwards with C-p (for every 4th C-p or so). This is
> because (one of the instances of) the following code is triggered.
>
> (unless noerror
> (signal (if (< arg 0)
> 'beginning-of-buffer
> 'end-of-buffer)
> nil)))
>
> But I don't see how (bobp) would normally return true in the middle of
> a buffer. Can anybody see why?
AFAICS it's rather the following code which produces the beeps:
(and (not done) (not line-done)
(zerop (vertical-motion -1))
(if (not noerror)
(signal 'beginning-of-buffer nil)
(setq done t))))
The beeps occur when `C-p' moves over an overlay in the testcase.
When this happens, (vertical-motion -1) returns 0 even though it moves
point up one screen line. So it could be a problem in
`vertical-motion'.
--
Ralf
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